dj_with_rails_ar.rb

class MyJob < ActiveRecord::Base

  def bulk_task
    start()
    task_work()
    @log.info("Errors missing: #{errors.inspect}")    
    finish()
  end
  
  private

    def start
      @log = Logger.new('/Users/rob/project/logs/job.log')
      @log.info "Starting #{Time.now}"
    end
  
    def finish
      @log.info("Error missing in finish: #{errors.inspect}")    

      log_errors unless errors.empty?
      @log.info "No Errors" if errors.empty?
      @log.info "Finished #{Time.now}"
    end
    
    def task_work
      #do some magic...
      # the magic fails
      # lets add an error to the activerecord errors
      self.failed = true # set the failed field to true
      errors.add_to_base("The magic wasn't so magic after all!")
      @log.info("Error added: #{errors.inspect}")    
      save!
    end
  
    def log_errors
      # we never get here... errors is always empty, even though we set one on line 30
      errors.full_messages.each do |error|
        @log.error("#{error}")
      end
    end

end

class MyJobsController < ApplicationController
  def create
    job = MyJob.create(:name => "My Job")
    job.send_later(:bulk_task)
  end
end